Continuous: --- dB · Peak≈: --- dB · Dist: --- m

SPL Color Legend

High SPL (≈180 dB)
Medium SPL (≈120 dB)
Lower SPL (≈80 dB)
Very Low SPL (≈60 dB)

Distance to OSHA levels

Continuous field SPL along downwind / upwind / crosswind rays. Switch Bare / Suppressed below — no side-scroll. Engineering broadband estimate — not certified Lpeak / LAeq.

Level Downwind Upwind Crosswind

140 dB peak row uses the peak-style pressure-sum estimate vs OSHA 1910.95 impulsive/impact footnote (≤140 dB peak SPL) — not a lab Lpeak.